Polymer superstructures are self-assembled structures formed by the spontaneous organization of polymer chains. These structures can have a wide range of shapes and sizes, including spheres, rods, and lamellae. The properties of polymer superstructures depend on their architecture, which is determined by the interactions between the polymer chains.
The new theoretical framework developed by the Penn researchers provides a way to understand and predict the behavior of polymer superstructures by considering the free energy of the system. Free energy is a measure of the thermodynamic stability of a system, and it can be used to determine the conditions under which a particular superstructure will form.
The researchers used their theoretical framework to study the self-assembly of block copolymers, which are polymers that consist of two or more different types of monomer units. Block copolymers can form a variety of superstructures, depending on the composition of the block copolymer and the conditions under which it is assembled.
The researchers found that their theoretical framework accurately predicted the behavior of block copolymers, and it also provided new insights into the mechanisms of self-assembly. This information could be used to design new block copolymers with tailored properties for a variety of applications, such as drug delivery, tissue engineering, and energy storage.
"Our work provides a new way to think about polymer superstructures," said Jian Qin, a postdoctoral researcher in the Department of Materials Science and Engineering at Penn and the first author of the study. "We believe that this theoretical framework will be a valuable tool for understanding and designing these materials for a wide range of applications."
The study was supported by the National Science Foundation and the Army Research Office.
